Question

This is a previous exam question
that the professor gave us as strictly practice for the upcoming
exam. Cut off on the left hand side is 2.3V.

Problem reads as the following: For the circuit shown below, use
Ohm's Law and Kirchoff's Laws only to find voltage v_x and i_x.
Note: the current in the 7.3 ohm resistor is 500mA as shown in the
circuit.